Find the Value of the Linear Correlation Coefficient R A) 0246
B) -0

question 143

Multiple Choice

Find the value of the linear correlation coefficient r.
-The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands) : $$\begin{array} { c | r r r r r r r r } \text { Cost } & 9 & 2 & 3 & 4 & 2 & 5 & 9 & 10 \\\hline \text { Number } & 85 & 52 & 55 & 68 & 67 & 86 & 83 & 73\end{array}$$

• A) 0.246
• B) -0.071
• C) 0.235
• D) 0.708

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Definitions:

Charles Spearman

A British psychologist who is best known for his work in statistics and intelligence theory, including the concept of general intelligence (g factor).

Psychologist

A professional specializing in diagnosing and treating mental, emotional, and behavioral disorders through various therapies and techniques.

Cross-sequential Research

A research method that combines both cross-sectional and longitudinal designs to study changes across different groups over time.

Intellectual Development

The process by which an individual's mental capabilities grow and mature, encompassing problem-solving, memory, and understanding complex ideas.